Unavailable to complete my backer portal purchase

Hi guys, for the past few months I’ve been having issues whenever I try to upgrade my Kickstarter pledge through the backer portal. I believe the issue comes from the fact that I live in Argentina, and with the country facing serious financial issues and fierce financial regulations, I’m unable to purchase the upgrade with my credit card, I’ve tried several different cards from different banks already but to no avail. I wanted to ask how much time I have left till I’m unable to upgrade my pledge, and if there was any other method available to do so.
Thanks for your attention, I will be waiting for any kind of reply.
If you need any kind of info, like my pledge number, please let me know.

I think you should write an email directly to the team : team@owlcatgames.com

Thanks! Will try to contact them through there.